JPS57172355A - Electrophotographic copying method for plural copies - Google Patents

Electrophotographic copying method for plural copies

Info

Publication number
JPS57172355A
JPS57172355A JP5763281A JP5763281A JPS57172355A JP S57172355 A JPS57172355 A JP S57172355A JP 5763281 A JP5763281 A JP 5763281A JP 5763281 A JP5763281 A JP 5763281A JP S57172355 A JPS57172355 A JP S57172355A
Authority
JP
Japan
Prior art keywords
optical image
charging
primary
image
photoreceptor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP5763281A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Mimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Corp
Original Assignee
Olympus Corp
Olympus Optical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olympus Corp, Olympus Optical Co Ltd filed Critical Olympus Corp
Priority to JP5763281A priority Critical patent/JPS57172355A/en
Publication of JPS57172355A publication Critical patent/JPS57172355A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)

Abstract

PURPOSE:To obtain plural copies superior in resolution and etc. with one formation of a latent image, by repeating charging and irradiation of an optical image on a photoreceptor, where a conductive supporting material, an insulating layer, and a photoconductive layer are formed in order, under prescribed conditions. CONSTITUTION:A photoreceptor 11 where an insulating layer 13 and a photoconductive layer 14 are formed in order on a conductive supporting material 12 is produced. The primary charging (negative charging due to a corona charger 21) is performed for the photoreceptor simultaneously with or after the irradiation of the primary optical image (shown by arrows). Next, the charging with the polarity opposite to that of the primary charging is performed while irradiating the inverted image of the primary optical image. Next, the primary optical image is irradiated again. Thus, latent images of positive and negative charge patterns are formed on both surfaces of the insulating layer 13. Latent images where light parts L3 and dark parts D3 of the primary optical image are different in polarity are obtained. Since a toner and a copy paper are not directly brought into contact with electrostatic charge, many copied pictures with good contrast and resolving power are obtained with one formation of the latent image.
JP5763281A 1981-04-16 1981-04-16 Electrophotographic copying method for plural copies Pending JPS57172355A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5763281A JPS57172355A (en) 1981-04-16 1981-04-16 Electrophotographic copying method for plural copies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5763281A JPS57172355A (en) 1981-04-16 1981-04-16 Electrophotographic copying method for plural copies

Publications (1)

Publication Number Publication Date
JPS57172355A true JPS57172355A (en) 1982-10-23

Family

ID=13061263

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5763281A Pending JPS57172355A (en) 1981-04-16 1981-04-16 Electrophotographic copying method for plural copies

Country Status (1)

Country Link
JP (1) JPS57172355A (en)

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